Supramolecular assembled of hexameric water clusters into a 1D chain containing (H(2)O)(6 )and [(H(2)O)(4)O(2)] stabilized by hydrogen bonding in a copper complex

BACKGROUND: Various water clusters including hexamers, heptamers, octamers, decamers and 1D or 2D infinite water chains in a number of organic and inorganic-organic hybrid hosts, have been reported. RESULTS: {[Cu(pydc)(amp)].3H(2)O}(n )has been hydrothermally synthesized and characterized by elemental analysis and by IR spectroscopy. A wide range of hydrogen bonds (of the O-H...O, N-H...O and N-H...N type) are present in the crystal structure. Hydrogen bond interactions between the co-crystallized water molecules led to formation of six-membered rings with chair conformation. CONCLUSION: In {[Cu(pydc)(amp)].3H(2)O}(n), there are three uncoordinated water molecules. Thermal methods confirm number of co-crystallized water molecules in polymer. Hydrogen bond interactions between the co-crystallized water molecules led to the formation of a six-membered ring with the chair conformation. These rings are part of a 1D chain containing six-membered O6 rings, which are alternately made from (H(2)O)(6 )and [(H(2)O)(4)O(2)] rings. [(H(2)O)(4)O(2)] rings are also in chair conformation.